Adding-machine.



F. C. RINSCHE.

ADDING MACHINE.

APPLICATION FILED JULY 24.1913.

IIIILVVI! F. C. RINSCHE. ADDING MACHINE.

APPLICATION FILED JULY 24. 1913.

1 ,262,702. Parfented Apr. A16, 1918..

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F. C. RINSCHE.

ADDING MACHINE.

.APPLICATION FILED JULY 24.1913.

1,262,702. Patented Apr. 16, 1918.

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F. C. RINSCHE.

ADDING MACHINE.

APPucATioN r|Lo1uLY24.1913.

1,262,702. Patented Apr. 16, 1918.

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F. C. RINSCHE.

ADDING MACHINE.

APPLlcATloN man JULY 24.1913.

` 1,262,702. Patented Apr. 16, 1918.

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F. C. RlNSCHE.

ADDING MACHINE.

APPLICATION FILED JULY 24.1913.

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Patented Apr. 16, 1918.

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ADDING MACHINE.

APPLICATION HLED 11111124.1913.

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FRANK C..RINSCHE, OF DETROIT, MICHIGAN, ASSIGNOR TO BURROUGHS ADDING MACHINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

ADDING-MACHINE.

To all whom t may concern:

Be it known. that I, FRANK C. RINSCHE, a' citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain newand useful Improvements in Adding-Machines, of which the following is a specification.

The present invention has for its object in general to provide an equipment for ,adding or calculating machines of thel key driven type whereby the power ordinarily derived through manual exertion by way of finger pressure may be supplanted in an' efficient and reliable way by electrical impulses. The invention has more especially to do with that type of machine wherein denominational actuators in the form of levers with segmental racks are employed to impel gearing leading to registering wheels. In the form of embodiment of my present 1nvention herein specifically disclosed, the keys which are arranged as usual in denominational rows extending from front to rear serve merely to operate electrical cont-act devices and to couple differential stop mechanism to the registering levers, the latter being impelled through suitable translating connections of a yielding character.

Besides providing for the performance of addition, in such manner as above indicated, the present invention supplies additional electrical equipment for facilitating the performance of multiplication by the process of repeated addition. Thus through the employment of any one of a set of multiplier digit keys a circuit may be established and contact devices so controlled as to provide for repetition of adding operations in automatic succession to the number represented by the operated digital multiplier key, members of the stop mechanism set for determining the multiplicand remaining set until the requisite number of operations of the machine have been had whereupon there is not only automatic cessation of operation of the machine but automatic release of said members of the stop mechanism.

The invention further extends to an' elec trical equipment for performing thenoperation of canceling or zeroizing, which. according to the form of embodiment of the invention herein disclosed. may be brought about by the mere depression of a contact-closing key, the resultant electrical impulse being Specification of Letters Patent.

Patented Apr. 16, 1918.

translated into a cycle of movement of Zeroizing mechanism.

In the accompanying drawings, forming a part of this invention, Figure l represents in right-side elevation with the inclosing case in section, a machine having the electrical equipment of the present invention; Fig. 2 is a sectionalized left-side elevation of the machine; Fig. 2a is a detail elevation of certain parts shown at normal in Fig. 2, said parts being out of normal4 in Fig. 2a; Fig. 3 is a top plan view of the machine with portions of the casing broken away and some interior parts sh'own in section; Fig. 4 is a sectional right-side elevation taken substantially on the line I l of Fig. 3; Fig. 5 is a sectional rightside elevation of certain of the parts shown at the right-hand portion of Fig. I differently conditioned as a result of depression of an amount key; Fig. 6 is a view similar to Fig. t and illustrating further efi'ects of depression of an amount key; Figs. 7 and 8 are views on the same order as Fig. 2 being intended more especially to illustrate the action of the multiplying devices, Fig. 7 illustrating one of the multiplier keys depressed and F ig. 8 illustrating the effect of release of that depressedkey; Fig. 9 is a diagrammatic illustration of the electric circuits and cont-acts.

In so far as the actual registering mechanism is concerned, the machine here shown is substantially identical with the machine disclosed in prior Patents Nos. .1,016,501 and '1,023,168 issued February 6th and April 6th,

therefore be unnecessary to give a detailed description of this mechanism and it will be sufficient to start with the registering levers F which coperate at their forward ends with the registering mechanism exactly as described in the aforesaid patents but which do not receive moti-on as in said patents as a direct result of the manual `act of applying finger pressure to the amount keys. In furtherance of the object of the present invention these registering levers are pulled downward by electrical impulses, solenoids being preferably employed whose cores are operatively connected with levers which are in turn yieldingly connected to the respective registering levers. The construction for each denominational order is the same so that a detailed description of one set of devices will sufiice for all. Referring more particularly to Fig. 4 the registering lever I" is connected -by a-spring 14 with the forwardly and downwardly extending arm 15 of a bell-crank lever loosely mounted upon frame crossrod f and having its upwardly extending arm 15n coupled by a link 1G to the cross piece 17 of the core of a horseshoe solenoid 18. Rearward movement of the arm 15n of said bell-crank is limited by contact of a laterally turned end portion 15'z of the other arm 15 against the under edge of the registering lever F. 'hen the solenoid is energized the arm 15u of said bell-crank is pulled forward and the arm 15 swung downward and the latter through the medium of the spring 14 pulls down the registering lever as far as it is permitted to go by the stop mechanism brought into action by the depression' of an amount key which also closes the circuit through the solenoid. Reference numeral 19 designates the amount keys which extend a short. distance above an upper casing plate Q0 covering the solenoids, said keys having stems 19a occupyingr slots in said plate 20. These keys arefadapted to be depressed a comparatively slight extent uniformly, the work they have to do being merely that of coupling slide strips Q1, in the nature of supplemental key stems, to the registering lever. and that of shifting contact devices to close a circuit through the associated solenoid.

The slide strips 21 work through slots in an upper casing plate E and through slots in lower angular plates C', and these strips are longitudinally slotted to embrace frame cross-rods a which limit their downward movement, all substantially as in the case of the key stems designated D in the abovementioned Horton and Pasinski patents. For purposes of the present invention` however, these slide strips are not integral with the keys but are in telescopic relation thereto, each strip being bifurcated for a considerable distance at its upper portion and the associated key stem 19a being reduced in Width a corresponding distanceto form a tongue 19b occupying the bifurcation of the strip. The shoulders at the upper end of the tongue operate upon the upper end edgesof the strip to depress the latter suticiently to effect a coupling of the same with the registering lever and then the strip YYY.moves on independently of the key as the said lever is pulled down, the movement of the latter being limited by abutment of the upper end of the strip slot against the frame cross-rod a..

For coupling purposes the registering lever carries a longitudinal series of downwardly and rearwardly pointing V-shaped studs Q) one for each of the slide strips or supplemental key stems. 0n -each of said strips there is pivotally mounted a hook 23 formed to interlock with one ot' the said lever Studs. Above its pivot the hook is formed with an open cam slot 23 which normally embraces thel lframe cross-rod l and cooperates therewith to engageI the hook with the stud and disengage it therefrom. Normally the cross-rod occupies the bottom portion of the slot as illustrated in Fig. 4 and by reason of engagementI with the lower side of the slot holds the hook away from the stud, this condition being brought about through the action of the familiar Spring (I which normally upholds the key. Upon de pression of the key the upper side. of the cam sloty is forced into engagement with the cross-rod (t and the hook swung forward as the slide strip 21 is forced downwardly and in this manner the, hook is brought into engagement with thc stud as a result of the limited downward thrust 0f the strip by the key. Movement of the hook is limited by contact of bent-over portions or lips thereof 23C and 23d with front and rear edges of the slide strip 21, and to prevent` any possible locking down of the slide strip 21 by reason of the branch of the hook above the cam slot getting in front of the cross-rod a or otherwise being obstructed by it, a rearward arc-shaped extension 23 is formed upon that branch of the upper part of the hook. It will be understood that when the hook and stud have been brought into engagement and the registering lever 1s- 'the descent of the slide strip and the descent of the registering lever. The extent of downward movement otl the lever varies according to the distance, of the particular stud in action from the pivot of the lever, this being governed to some extent also by t-he slight difference in the length of the slotsof the slide strips or supplemental stems of the lower value keys. Any overthrow which might otherwise occur through springing of the level' when the higher valued keys are used will be prevented by the same sort 0f stop devices which are disclosed in the aforesaid Horton and Pasinski patents for a similar purpose, it being noted that the roller studs for operating the stop devices are upon the supplemental key stems or Slide Strips'21.

Referring now to the other functim of the amount keys, to wit, that of operating contact devices to energize the solenoids and still referring to Fig. 4 which illustrates a normal condition, the key stems 19l have studs 19e `which engage angular slots 25 in a bar 25 supported at its forward end by radius link 26 journaled on shaft a* and "-vaforesaid three-armed lever,

by i spring Zl" mounted at its rear on a similar radius link 27 which constitutes the upper arm of a lever pivoted on frame cross-rod at. r1`he lower arm 2T" of this lever is drawn rearwardly by spriiw` 28 and at itsl lower end has an inclined stud 27 normallyv projecting under the inclined flange or lip 31 of a wiper piece' 31 pivoted upon the forwardly projectingarm 3:2 of a three-armed lever whose upwardly extending arm 32a carries a pivoted pressure arm 323 for operating the contact device 3i. IThe latter is pivoted to a plate 35 mounted upon an insulation block 3G and has a V-shaped upper end coacting with thc V-shaped portion of the said pressure arm in the shifting of the contact device one way or the other, and below its pivot said contact device has an arm 34 which has a contact stud 34h confronting a similar stud 235 on a plate 35 fastened to the under side oi' the said insulation block.

The normal condition is that illustrated in Fig. l wherein as before stated the inclined stud 2T is under the inclined lip or flangela. the lower arm 9.7 of the lever 27 being rearward and a lip-31b of the wiper piece 31a being engaged with the under edge of the for\\'ardl projecting arm 32 of the being so held which connects an upper branch of said wiper piece with a rearwardly located ear of the said arm 32. lVhen any one `of the keys is depressed and its stud 19e operates with a camming effect upon the rear side of the inclined leg or branch of the slot 25 and the bar 25 is thereby forced rearwardly, the lever-arm 27 is swung forward and its inclined lug or stud 27 acts with a cainming effect against the under side of the wiper piece flange 31- Thereby the. three-armed lever is rocked rearward and the V-sliaped extremity of the pressure arm (which normally stood forward of the V-shaped extremity of the contact piece Si) is forced over the point of the latter whereupon a spring 87 connecting` said pressure arni to the central portion of the three-armed lever snaps the contact stud 34D into engagement with the contact stud 35 (Fig. 5) by reason of the camming coaction of the rear side of the V-shaped end of the contact piece and the forward side of of the V-sha'ped end of the pressure arni. Rocking of the three-armed lever is limited by contact of its rearwardly projecting arm 32 with a frame cross-rod a7.

Then the Contact is thus made a circuit is closed and the solenoid 18 energized so that immediately the registering lever 12 is pulled down until the slot of the coupled slide strip 21 strikes the cross-rodv a, the

spring 1l then stretching as the solenoid core completes its stroke. In the registering mechanism shown, which is that of the Horton and Pasinski patents, the wheels are advanced upon the return strokes of the registering levers through the power of springs 1 which connect downwardly-extending branches of the levers with the fixed plates C and are inferior to the Springs 14. 1n order that these springs may take effect to accomplish the registering it is of course essential that the contacts be separated. This is done automatically as the solenoid core reaches the end of its initial stroke. To this end a thrust bar 88 is pivotally coupled to the lever 15 and extends forward over the pressure arm 33 and through a slotted guide plate 39, said bar having a laterally projecting finger 38 (Fig. 3) in rear of an upward extension ofthe arm 32 of the threearmed lever, Normally said extension is spaced from said finger as illustrated in Fig. l and its rearward movement is slight so that when the Contact has been made it is still spaced from said linger (Fig. 5) but it is then within the range of movement of the latter so that as the solenoid core reaches the end of its stroke the finger will throw the lever arm 32 back to normal as illustrated in Fig. G so that the point of the V-shaped end of the pressure arm 33 is carried forward over the point of the V-shaped end of the contact member Si and the latter cammed back to normal as also shown in Fig. 6 so that the solenoid is denergized and its core moved out first by the spring 1-1 and then by the spring F2. The coupler hook 23 of course returns along`i'vith the depressed slide strip 21 as the latter is lifted by lits spring (l and when the lower side of the cam slot 23a strikes the crossrod a the. hook will he rocked out of engagement with the stud 22 of the lever. It is assumed of course that finger pressure on the key 19 has heen released, though it is immaterial at just what particular point this release occurs for the key does not have to stay down after the hook has been coupled to the lever and the latter starts on its downward excursion and if the key is held down beyond the time when the contacts are separated that cannot affect the operation.` lllhen the lever arm 532 is rocked hack to normal from the position to which it was moved by the stud 20h, the wiper piece fiange 31 simply moves from the position shown `in F ig. 5 to the position shown in Fig. 6 so that when the key is thereafter released the lug 27b wipes over the upper side of said flange rockingthe wiper piece on its pivot and then the latters spring 3lc restores this piece so that the normal relation between it and the lever 28 is resumed. The angle slots 2. a in the bar 25 provide for the locking out of all other keys while any one key is depressed. as clearly illustrated in Fig. 6.

Passing to the matter of multiplication, this involves repeated addition of the multipli-and without repeated depression of keys, so that the contact devices above deso held by reason of the fact that the said scribed are not emplo ed but companion contact devices of a simi ar character come into play. Thus, referring to Fig. 4 there is pivotally mounted upon the plate 35 a second contact member 40 which is a du licate of the before-described member 34 an it has on its lower arm a contact stud 40 to engage a contact stud 4()b on the plate 35h. This contact member 40 is worked by a pressure arm 41 similar to the arm 33 and similarly connected by a spring 42 to a lever 43. The latter differs however from the lever which carries the pressure niece 33, in that it does not have a forwar y extending arm. It does however have an upward extension with which the finger 38a of the thrust bar 38 cooperates, said finger beingr elongated so as to extend in rear of the extensions of both levers as shown in Fig. 3. The extension of the lever 43 also coperates with a short linger or lug 38C on said thrust bar 38 extending in front of the lever extension.

Unlike the contact devices first described, these now being considered are normally in engagement as illustrated in Fig. 4, being shortlinger or lug 38c holds the lever 43 rearwaid so that the V-shaped end of the pressure arm 41 is on the rear side of the V-shaped end of the contact member 40. The effect is the same as with thef other contact members as to separation by the thrust bar 38 as the solenoid core completes its initial stroke, but is different as to automatic rengagement of contacts for in the case of the devices now being described the contacts will Ibe again brought together as the solenoid core completes its rear stroke.

There being a pair of these secondary contact members for each row of keys and said members being normally in engagement it is necessary to provide supplemental contacts to be closed by the keys so that the solenoids will be energized only in those orders wherein digits of the multiplicand occur. To this end there are mounted upon the horizontal casing plate E pairs of c011- tact members for the respective rows of keys, the members of each pair beingnormally out of contact. Referringto Fig. 4, 50 designates the movable member of a pair of such contact devices, the same being in the form of a spring strip fastened at its base bya suitable bracket to and suitably insulated from said casing plate E and having a.

contact stud 50a at its upper end. The fixed member 50b'of this pair of contact devices is similarly mounted upon the casing plate and has a contact stud 50 confronting that of the movable member 50. The latter extends just in rear of a stud 25 of insulating material which is carried by the bar 25. When the latter is forced rearwardly through depression of any one of the keys the contact members will be brought together an obvious manner. They are in circuit with the previously described members 40 and 40, so that with the circuit otherwise closed, through controlling means hereinafter described, the depression of a key will result in energizing the solenoid independently of the first-described contact members 34 and 35, though of course in the act of de ressing a key these contacts are also broug t t0- gether. The point to be noted here is that the contacts 40 and 40b remain engaged while the contacts 34 and 35 are separated so that as to continued depression of the key the circuit can be maintained by reason of engagement of the third pair of contacts 50 and 50". Even in the initial depression of the key when being used for multiplying purposes the coming together of the contact members 34 and 35a would itself have no energizing effect upon the solenoid, for the reason that a switch is provided for cutting out these contact members. For the same reason the normal engagement of the contact members 40 and 40b has no effect to energize the solenoids when the machine is in use for simple addition. Reference to the circuit diagram (Fig. 9) may be useful at this point. Here it will be noted that the switch members 40-40b and 50-50b are wired in series to a terminal 60, and the contact members 34-35 are wired in series to a terminal' and a switch 61 is arranged to be shifted from one terminal to the other. One line wire is illustrated as in electrical connec- Ytion with said switch and the other line wire 81 as in series connection with the several solenoids which are wired respectively to the plates 35b which carry'both the contact studs 35a and the contact studs 40".

Referring to Figs. 1 and 3, the controlling switch is shown in the form of a flat spring 61 working between terminal studs 62 and 63 and a slide key 64 is mounted to work back and forth in a slot of a supplemental plate 65 secured to the casing plate E, said key having a short rounded lower end 64 adapted when the key is slid rearward' to engage an inclined portion of the switch 61 so as to depress the latter and change the adjustment from a multiplying to an adding one. The said supplemental plate is preferably inscribed with abbreviations as illustrated in Fig. 3 so that the operator may know at a glance that when the key is forward the switch is set for multiplyirg and when it is rearward the switch is set for adding.

Since the purpose is tolli-ave the machine operate automatically the number of times performed. To this end an additional pair of contact members is arranged in the multiplication circuit the same being designated oo and (3T in the diagram (Fig. 9) where they appear normally separated. Therel is at the left of the keyboard a special row otI keys be" w'hich are the multiplier keys and depression of any one of which will brink these Contact members (3o-GT into engagement and will also result in setting an escapement mechanism to count the number of operations and cause them to automatically cease according to the munber represented by the particular key depressed. The keys are numbered from one to nine and are of a similar character to the regular keys shown in the Horton and Pasinski patents. Furthermore they operaie di tl'erent ially upon ay lever (i9 after the manner of the regular keys of the Horton and Pasinski constructions upon their registering levers and this lever G9 similarly operates a nmnbered wheel (39*l which however is not connected with the adjacent wheel of the registering lcver-nieehanism to receive a transfer or carry therefrom. Said wheel 439 merely serves as an indicating wheel to show the multiplie;` digit when the depressed key (i8 is released.

l'eferring to Figs. 2, 7 and 8, the lever G9 carries an escapement member in the form of a doubh` ratchet rack 90 secured to the said lever'and projecting upwardly therefrom. its teeth running along the front and rear sides with abrupt edges facing upward. The balance of the escapement comprises a pair of arms 91-92 hung upon a frame stud 93 and connected together by a spring` 91. the arm 92 having' a forwardly extending branch 93 which abuts spring-stud 96 on the arm 91 whereby the two arms are held apart. The arln. 92 is cm'ved toward the ratchet rack 9() and has a laterally turned portion 92 extending in rear of the latter and beveled on the. forward. edge` this laterally turned portion constituting a pallet dog to cooperate with the rear teeth on the ratchet rack. The other arm 91 of the escapement pallet has a similar laterally7 turned portion 91"L at itsI lower end to cooperate. with the teeth on the front ofthe ratchet rack.

Normally arm 91 is forward as shown in Fig. '2 and the dog 92 of arm 92 below the lowermost tooth of the series on the rear edge of escapement rack 90. Upon depression of the rack its teeth successively force the arm 92 rearwardly stretching spring 91 which as soon as any tooth passes pulls said arm forward pulling its dog 92 over the abrupt edge of the tooth to hold the rack and lever down. l`he dog 91a on the other arm 91 is otfset or stepped do\.'n\vardly relative to dog 92 so that when theI latter is withdrawn from engagement with a racktooth by r arward swing of. arm 92y brought `about through rearward swing of arm 91, said dog 91l will strike the inclined back of the tooth of the front edge of the rack which tooth is nextv lower than the rear rack tooth engaged by dog 92.

Obviously, vibration of the pallet will provide. for step-by-step rise of the ratchet rack and the lever ('9 when one of the keys (3S has been depressed and released-the lever being forced dowiiwardly against spring F2 which serves as do the other springs similarly designated to normally elevate the lever. It will thus be obvious that depression of the lever (39 t0 different extents by the multiplier keys, followed by vibration otl the escapement pallet in successive operations of the machine will provide for counting the operations according to the value of the depressed key as representative of a multiplier digit, r

Coming back now to the multiplier contacts Gti and (3T. which as before stated are normally separated. the depression of any one of the multiplier keys (3S operates to bring those contacts together and, through the above described escapement mechanism, to again separate them when the requisite number of operations of the machine have been had.

Referring further to Figs. 2, 7 and S the movable contact ot is of the same form as the before described movable cont-acts 3J: and #10. and the fixed contact (3T is of the samej character as the before described contacts 55 and t0". Fm'thermm'e the shifting of the contact member oo is effected in a similar manner to the shifting of the contacts 31 and t()` a pressure arm 199 being employed for such purpose and formed with a V-shaped extremity which cooperates with a V-shaped portion of the contact member GG. For a reason which will become. clear presently the extremityv of the pressure arm 100 is normally spaced a slight, extent from the forward side of the vl-shaped extremity of the contact member (3o. and the lat-ter has a rearwardly projecting branch G6 upon which a foot 100 of the pressure arm presses to normally hold the contact separat-ed as illustrated in Fig. 2.

It. will of course he understood that when a series of additions are to be performed for multiplying purposes the operation should noty startuntil the number has been predetermined by depression of one of the keys (58. 'llherefore the ln'ingin g` together of the contacts 5() and 5o" in the orders where keys 19 are depressed to set up the multiplicanddoes not have the ctl'ect. of closing the circuit through the solenoids notwithstanding all of the contacts t() and 10b are engaged in pairs. This is all merely` preparatory to the closing ofthe circuit b v the bringing together of the contacts (3o and (37. Furthermore the latter contacts should not be brought together until CAD the multiplier key has been fully depressed and released, in order to insure that the escapen'ient action starts properly and that the number of operations of the machine correspond with the ordinal of the depressed keV.

The keys 68 cooperate with an overthrow preventing mechanism of the same character as that shown in the Horton and -Pasinski patents the same including among other elements a reciprocating cam bar 101. I utilize this cam bar for the purpose of effecting a release of the escapement pallet and movement of the pressure arm 100 rearward for effecting circuit closing movement of the contact member 66. Said pressure arm ,is pivoted at its rear end to tbc side piece 102 of a bail and the latter is drawn rearward by a spring 103 and there is also pivotally connected to said side piece a long link 104 which extends forward and is coupled to the pallet arm 91. The bail side piece 102 has a forward and upwardly curved extension 102a below its pivot, which extension is normally engaged by the laterally turned portion or foot 105 at the rear end of one arm of a lever 106 which is pivoted intermediate its ends upon frame stud 107 and is formed at the forward end to coperate with an escapement bell crank 108which in turn coperates with the aforesaid reciprocating bar 101. rlfhe latter carries a stud 101 which is cut in the under side with a V-shaped notch. In this normally seats the V-shaped end of an upwardly extending branch 108a of the horizontal arm of the bell crank 108 as shown in Figs. 2 and 8, this engagement being enforced by a spring 109. Obviously whenever the bar 101 is shifted one way or the other by depression of one of the keys 68 the action of the stud 101n upon the said bell crank branch 108a will result in depressing the horizontal arm ofithe bell crank and swinging' forward its depending arm. The latter is bifurcated at its lower end and formed with laterally turned portions 108b and 108c constituting escapement dogs,-the portion 108c extending obliquely and the portion 108b substantially horizontally and the latter being beveled at its forward edge and the former beveled at its upper edge. The latter beveled edge is normally substantially horizontal and, as shown in Fig. 2, a laterally turned portion or foot 106C at the lower end of a depending branch 106d of the lever 106 normally extends directly above this beveled edge of the dog 108.

W'hen the lever 69 is in its normal upward position it engages an upper laterally turned portion or lip 106e of said lever 106 (Fig. 2)

so as to uphold the forward arm of the lever against the tension of a spring 110 (inferior to the spring F2) and so hold the rear arm of the lever 106 down and the bail 102 forward, spring 103 being also inferior to spring F2. As before stated the V-shaped end of the pressure arm 100 is normally held slightly spaced from the contact member tt as shown in Fig. 2. This has to do with the escapement action of the bell crank 108. lVhen a key 08 is depressed and the bar 101 shifted and the said bell crank thus rocked its dog 108c is swung clear of the foot 100c as shown in Fig. 7 and the other dog 108b brought just under said foot so that a slight downward movement of the forwardly extending arm of the lever 100 ensues and therefore a slight rearward movement of the bail 102 which should not result in any movement of the contact member 06. as it is desirable that the machine shall not begin t0 operate until the lever (it) is all the way down and of course this slight movement would occur just as the lever starts down and releases the lever 100. As soon as the key is released the bar 101 shifts the other way so that the bell crankrmks back, and, the foot 100c having dropped below the upper edge of the dog 108, this foot may now pass between the two dogs as illustrated in Fig. 8 and the lever 100 partake of t'ull movement. rl`his has the effect of permitting the spring 103 to pull back the bail 102 and carry the point of the V-shaped end of the pressure arm 100 rearwardly of the point of the contact member G6 whereupon the latter is engaged with the fixed contact 07 and the tirst of the series of adding operations occurs. lVith the rearward swinging of the bail 102 the escapement pallet 91-02 is shifted so that the lever 09 rises one step.

The cross piece of the bail 102 extends in front of all of the lever-aims 15 as shown in Fig. $3 so that whatever may be the orders in which digits of tbe multiplicand occur7 the bail will be swung forward as the cores of energized solenoids` complete their initial strokes. it being understood that the bail normallyv stands forward of the said leverarms 15) as illustratcd'in Figs. 2 and 7 and when swung rearward by its `spring 103 has its cross bar brought against said levers or in close proximity thereto. The effect of the forward swinging of the bail is to again lseparate the contacts (S0 and 0T by reason of the point of the V-shaped end of the pressure arm 100 passing forwardlv over the point of the V-shaped end of the contact member 00.

lVitb each succeeding operation the lever (39 rises one step and with the last of tbe series of operations whose number is determined by the number of the. multiplier key depressed. the said lever operates upon tbe lip or fiangc 100Q of the lever 10G and forces that lever back to its normal position thus preventing the bail 102 from again swinging rearward (as of course it does in the preceding operations as soon as levers 1f; are retracted upon denergizing of the solenoids), and so preventing` the contact members (3G and G7 from again being brought together to close the multiplier circuit. ln this restoration of the levi-r 100 to normal the foot 10GC ig drawn up through the space between the dogs lOSJ and 10S", said foot acting against the luider-inclined side of the dog 10Hso as to slightly displace the bell crank 108 which restores as soon as the foot has passed lso that the upper beveled edge of. said dog is'again under the foot as illustrated in Fig. :2.

It is of course essential that during the successive additions to perform 1\.iultiplica tion the amount keys being depressed to set up the multiplicand shall remain depressed, and therefore means are provided under control of the switch key (il for holding down said keys. To this end the bars 25 are formed with notches 25 in their lower edges (Fig. (3) and catch levers 200, one for each of said bars, are journaled upon a frame cross rod Q01 on the casing plate E, the forward ends of said levers being connected by springs 20:2 with lower portions of the framework so as to tendt0 engage the catch projections on the levers with the bar notches. ormally the springs are restrained and the catch projections held away from the bars by a series of latches 203 secured to a rock shaft 204 (Figs. 4 and 6). said latches being in the form of arms having laterally turned end nortions. .Xn arm 205 (Fig. l) secured to the right-hand side of the said rock shaft QO-lis connected by' a link Q06 with tl'ie key (il. lVhen said key is slid for vard to the multiplying position the catch levers will be released and upon rearward movement of any of the bars the associated catch levers will become engaged with the notches of the displaced bars and prevent their return and therefore prevent rise of depressed keys.

lt is desirable that the keys be automatically released when the final adding operation of the multiplying series is performed. To this end the cross rod 201 is journaled in bearings upon the casing plate E so as to constitute a rock shaft and there is secured to it a bail con'iprising side arms 210 and a cross rod 211 extending under the forwardly projecting arms of the catch levers as shown in Figs. l and 6. A springl '212 (Fig. Zal attached to the left-hand side piece of this bail holds it down. Means are provided for lifting it when the lever (3.() makes its last one-step movement upwai-dlv after having been depressed b v one of the nnrltiplier keys. To this end said lever is formed with an upstanding projec tion 00d (Figs. 2, Qa) having a laterally turned end portion which is designed to act upon the, lower branch '215% of a lever whose upwazdlv extending armY 2l-. carries a Elf) to cooperate with a roller 210 on the left-hand side of the bail. Said wiper pawl is held by a spring 9,16 against a stud 21T and the arm Q14- of the lever is drawn forward b v a spring 220 against a. stop stud 221. As the lever 69 makes its last onestcp movement forward the said projection rocks the arm 2M of the lever rearward causing the wiper pawl Q15 to lift the bail and passl by the roller 216. The lifting of the bail thus effected'disengages the 'atch levers from the bars 25 and the latter swing forward as the depressed keys rise. The catches cannot rengage the notches of the bars because the latter will have passed on forward of the catch projections and the latter upon release of the bail simply strike against portions of the under edges of the bars to the rear of the notches. Then when the key (il is moved rearward to the adding position the laterally turned portions of the arms 203 will be carried over the laterally turned portions of the catch levers to latch them back.

Referring next to thel matter of turning the registering wheels forward to Zero, the mechanism for doing this is the same as disclosed in the llorton'and Pasinski patents comprising disks O2 gearedvto the numeral wheels N (Fig. 3) and having studs 0" operated upon by hooks R which are pulled down through suitable connections with a rock shaft S. In the machines of the llorton and Pasiuski patents said rock shaft is operated through connection with a handle while the present invention provides electrical connections for ope ating said shaft. Thus the arm 54 which is secured to said rock shaft is coupled at its end to a yoke 300 which at its opposite end is coupled to the core 301 of a horseshoe solenoid 302. The circuit through the latter is closed by pressure of a key 303 which bears upon a contact member BOt normally separated from a eompanion member 305 (Fig. l). (See also diagram Fig. 9). The contact member 30k is in the form of a flat spring and when pressure is reinpved from the key 303 it separates from the contact member 305 so that the solenoid is denergized and a spring 506 attached to the yoke 300 pulls the solenoid core and the yoke rearward and rocks the shaft S back to normal. It will be understood that the for 'ard and back 'ard rocking of said shaft causes the numeral. wheels to advance from varying positions of registration to zero just as described in the llorton andL Pasinski patents.

ln order to prevent any possibility of misoperation through simultaneous depression of the zeroizing key and other keys of the machine, l preferably put the various other switches or contacts which control adding and iuult-iplying in circuit with the switch member 304- so that upon depression of the. zeroizing key i303 the circuit will be broken.

Thus the plate 3031L has at its forward end a contact stud 304 normally engaging a similar stud 61C on the switch plate (31. rl`he plate 30% is permitted considerable movement throughout a portion ot' which the, resilient companion plate Z305 may also move. Therefore whether the plate (S1 is in its upper position closing the imiltiplyiiig circuit or, whether it has been slightly depressed by the sliding of the keys til to the adding' position, the contact studs E0-l," and G1C will be separated by depression ot' the zeroizing key and hence so long as the latter key is depressed no circuits can be closed through any of the adding or multiplying switches or contact members.

The tlc-Xing otl the spring strip Gl when the key ttt is moved rearward is so slight at the portion where the stud (31" is located, and the character ot the contact plate or strip 301 is such and the location ot' the zeroizing contact stud thereon, that there is virtually no flexing at the latter point so that when the key (it is thrust rearward there is no ett'ect to close the circuit through the zeroizing solenoid.

I claim: i

l. In a machine of the class described7 the combination with accounting devices and actuators therefor; of electrical means for separately iiiipelling the latter under circuit-closing.control of said manipulative amount determining devices, stop devices coupled by the latter to the actuators, and automatic circuit-opening means operated by the electrical actiiator-iiiipelling means.

2. In a machine ot` the class described, the combination with accounting devices and actuators therefor; of solenoids for inipelling the latter through yielding connections, means for energizing said solcnoids under control of said manipulative amount determining means, stop devices coupled by the latter to the actuators, and circuit-opening means operated by the solenoids.

In a machine of the class described, the combination of a registering lever; keys; independently movable key-operated members having couplers engageable with the lever in movement of said members by the keys; means for variously limiting movement ot' the lever according to the coupled key member; electrical means tor impelling the lever yieldingly; eireiiit-closingmeans operated by the keys; and circuit-opening means operated by the electrical in'ipelling means.

si. 1n a machine ot the class described, the combination ot a registering lever; keys; independently nic 'able key-operated members having couplers engageable with the' lever in movement o'tl .said keys; mains 'tor variouslv members by the limiting' movement of the lever according to the coupled key member; electrical means for iiiipelling the lever yieldingly; a movable contactV ineinber; a pressure device for shitting the same; key-operated connections for actuating said device to shift the said contact member to circuit-closing position; and comm-tions from the electrical lever-inipelliiig means tor operating the said pressure device to shitt the said member to circuit-opening position.

5. In a machine ofthe class described, the combination of a registering lever; keys; independently movable key-operated ineinbers having' couplers engageable with the lever in movement of said rmembers by the keys; means lor variously limiting movement of the lever according to the coupled key member; electrical means for impelling the lever yieldingly; a movable contact member; a pressure device for shifting the same; a lever carrying said pressure device; a rcciprocating baiI common to the keys; shifter means between the bar and the last-mentioned lever; and connections t'rom thc electrical lever-iiiipelling means t'or retracting said lever.

In a machine ofthe class dcscribtal, the, combination ot' a registering lever; keys; independently movable key-operated members having couplers engageable with the lever in movement of said members by the keys; means for variously limiting movement ot the lever according to the coupled key inember; electrical means for iinpelling the lever yieldingly; a movable contact member; a pressure device for shifting the same; a lever carrying said pressure device and having a pass-by motion-receiving member; a reci procating ba r common to the keys; a lever coupled to the bar and cooperating with said pass-by member; and a thrust-piece coupled to the electrical iinpelling means and adapted to retract the said pressure-piece-carrying lever.

7. In a machine of the class described` the combination, with registering wheels, means for individually advancing the same varying degrees and tor carrying from oneI to another to cause them to register an accumulation ot' amounts. electrical means for .impelliiig said wheel-advancing means` mechanism tor collectively advancing said wheels from diversified registering positions to zero positions, and electrical means tor impelling said inechaiiism; together with contact-making and breaking means having provisions for opening the circuit otf the Iirst-inentioned elect rical means as an incident to the closing ot the circuit ot the zeroizing means.

8. In a. machine ot the class described, the combination with registering wheels, i'neans for individually advancing the same varying degrees and tor carrying from one to another to cause them to register an accuimilation of amounts, electrical means for impelliiig said wheel-advancing means, mechanism for collectively advancing said Wheels from diversiied registering positions to Zero positions, said mechanism including a recipe rocating actuator, a solenoid connected to the latter, a contact piece normally in circuit with the rst-mentioned electrical means, and a key operating upon said contact piece to open such circuit and close a circuit through said solenoid.

9. In a machine of the class described, the combination of registering Wheels, actuators therefor, electrical means for impelling the actuators, keys and stop connections for measuring movement of the latter, contacts for effecting repeat operations of the electrical means, and means for predetermining the number of such repeat operations.

10. In a machine of the class described, the combination of registering wheels; actuators therefor; electrical means for impelling the actuators; keys and stop connections for measuring` movement of the latter; normally separated contacts; key-operated trip devices for bringing them ltogether; secondary normallyseparated contacts; means' for bringing them together and so maintaining them by the keys; normally engaged oontacts for circuit-closing at the same points as said lirst mentioned normally separated contacts; means for separating the latter and the normally engaged contacts by the electrical impelling means and tor reengaging the latter' thereby; a pair of normally separated contacts in circuit with said normally engaged contacts; keys; normally restrained connections tripped by the latter for bringing together said last-mentioned normally separated contacts, the same being again separated by the aforesaid electrical impelling means; and means set by the lastmentioned keys for variously timing the return to normal of said restraining connections according to which one of said keys is operated.

l1. ln a machine of the class described, the combination of registering Wheels; actu-4 ators therefor; electrical means for impelling the actuators; keys and stop connections for measuring movement of the latter; normally separated contacts; key-operated trip devices for bringing them together; secondary normally separated contacts; means for bringing them together and so maintaining them by the keys; normally engaged contacts for circuit-closing at the same point-s as said first mentioned normally separated contacts; means for separating the latter and the normally engaged contacts by the electrical impelling means and for reengaging the latter thereby; a pair of normally separated contacts in circuit with said normally engaged contacts; keys; normally restrained connections tripped by the latter for bringing together said last-mentioned normally separated cont-acts, the same being again separated by the aforesaid electrical impelling means; and an escapement mechanism differentially set by said last mentioned keys and operatively connected to the movable member of the pair of contacts aforesaid.

1Q. In a machine ot' the class described, the combination ot registering wheels; actuators therefor; electrical means for impelling the actuators; keys and stop connections tor measuring movement of the latter; normally separated contacts; key-operated trip devices for bringing them together; seeondar'y normally separated contacts; means for bringing them together and so maintaining them by the keys; normally engaged contacts for circuit-closing at the same points as said first mentioned normally separated contacts; means for separating the latter and the, normally engaged contacts by `the electrical iinpelling means and for reengaging the latter thereby; a pair ot normally separated contacts in circuit ivith said normally engaged contacts; a pressure piece ior shitting the movable member of said pair; a lever carrying said pressure piece; a spring tending to throw said lever to move said contact into engagement with its mate; a set. ot' keys; means operated thereby normally restraining said lever; an escapement member ditterentially acted upon by the keys of said set; and eoacting escapement members operatively connected to said lever; the latter being intermittently retracted by tlie electrical impelling means.

3. In a machine of the class described, the combination of registering Wheels; actuators therefor; electrical means for ilnpelling the actuators; keys and stop connections tor measuring movement of the latter; normally separated contacts: key-operated trip devices tor bringing them together- 7 secondary normally separated contacts;

means tor bringing them together and 'so maintaining them by the keys; normally engaged contacts for circuit-closing at the same points as said first mentioned normally separated contact-s; means for separating` the latter and the normally engaged oontacts by the electrical impelling means and :tor reengaging the latter thereby; a pair of normally separated contacts in circuit vvith said normally engaged contacts; keys; normally restrained connections tripped by the latter for bringing together said last-mentioned normally separated contacts; the same being again separated by the aforesaid electrical impelling` means; means set by the last-mentioned keys for variously timing thel return to normal ot' said restrain ing connections according to which one of said keys is operated; a switch tor cutting in and out said pair ot' contacts; and means controlled by said sivitcli tor holding stop connections set tor repeatedly measuring movement ot the actuators.

CLG

14.1n a machine of the class described, the combination of a registering lever having a series of catch projections; fixed cross rods; slide strips; coupling hooks pivoted to said strips and cam-slotted to engage said rods and adapted upon depression of the strips to engage said projections respectively; keys having stems separably engaging said strips respectively; electrical imelling means for the lever yieldingly connected therewith; and contacts operated by the keys.

15. In a machine of the class described, the combination of a registering lever; slide strips; couplers on the latter engageable with the lever; keys having stems separably engaging said strips; a bar shifted by the keys; normally separated contacts brought together by said bar; normally separated contacts brought together through operation of s`aid bar; tripping devicesl operative in the latter connection; contacts normally engaged; electrical Iimpelling means for the lever; means operated thereby to separate the second-mentioned contacts and the lastmentioned contacts and rengage the latter; multiplier keys; normally separated contacts under control thereof; means for effecting successive coming together and separation ol said contacts automatically a varying number ot' times governed by the particular one of said special keys operated; a switch for cutting in and out said contact devices; and a catch to hold the aforesaid bar displaced, said catch being rendered effective by said switch.

16. In a machine of the class described, the combination with accounting devices and their actuators; of means for individually imparting electrical impulses to said actuators, movement being transmitted to the actuators independently of each other, and manipulative circuit-controlling means with provisions for variously limiting movement of the actuators.

17. In a machine of the class described,

the combination with accounting devices and their actuators; ot' means for individually impart-ing electrical impulses to said actuators through yielding connections, movement being transmitted to the actuators independently of each other, anrlfmanipulative circuit-controlling means Witlprovisions for variously limiting movement of the actuators.

18. In a machine of the class described, the combination with adding' mechanism, actuating levers for the several orders thereof, and a series et' keys one for each order; of a magnet or solenoid for cach order, yielding connections between the armature or core thereof and the actuating lever of the same order, and stop devices controlled by the keys7 there being a set of such devices for each series of keys and dilibrentially related to the actuating lever for variously limiting its stroke.

19. In a machine of the class described, the combination with adding mechanism, actuators for the several 'orders thereof7 and a series of keys for each order; of a magnet `or solenoid for each order, connections between the armature or" core thereof and the actuator of the same order,v and means controlled by the keys for differentially measuring the strokes of the actuators.

FRANK C. RINSCHE. Witnesses:

R. V. FAIRCHILD, R. S. MIELERT. 

